Type II and Type III Radio Bursts and their Correlation with Solar Energetic Proton Events
Abstract
Using the Wind/WAVES radio observations from 2010-2013, we present an analysis of the 123 decametric-hectometric (DH) type II solar radio bursts during this period, the associated type III burst properties, and their correlation with solar energetic proton (SEP) properties determined from analysis of the Geostationary Operational Environmental Satellite (GOES) observations. We present a useful catalog of the type II burst, type III burst, Langmuir wave, and proton flux properties for these 123 events from the current solar maximum period. We find that all strong SEP events are associated with a type II burst and virtually all SEP events, 92%, are also associated with a type III radio burst. Based on a principal component analysis, the radio burst properties that are most highly correlated with the occurrence of gradual SEP events and account for the most variance in the radio properties are the type III burst intensity and duration. Further, a logistic regression analysis between the peak proton flux and the radio-derived principal component (dominated by the type III and type II radio burst intensity and type III duration) obtains predictions approaching the human forecaster rates, with a false alarm rate of 17%, a probability of detection of 65%, and with 88% of the classifications correct. Therefore, type III radio bursts that occur along with a DH type II burst are shown to be an important diagnostic for forecasting SEP events.
- Publication:
-
Solar Heliospheric and INterplanetary Environment (SHINE 2014)
- Pub Date:
- June 2014
- Bibcode:
- 2014shin.confE.104W